<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* .box{
            width: 300px;
            height: 300px;
            background-color: chartreuse;
        } */
    </style>
</head>
<body>
    <input type="text" id="ipt"/>
    <script>
     const oIpt =document.getElementById("ipt");

     function center(e){
        console.log("发送数据");
        console.log(e);
        console.log(this);
     }
     oIpt.onkeyup=debounce(center,500);
     
     function debounce(fn,time){
        let timer=null;
        return function(e){
            clearTimeout(timer);
            timer =setTimeout(()=>{
                fn.call(this,e);
            },time);
        };
     }
    </script>
</body>
</html>